Move webkit/common/gpu/test_context_provider_factory.* to content/test/

BUG=338338

Review URL: https://codereview.chromium.org/160013003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250566 0039d316-1c4b-4281-b951-d872f2087c98
Clang update script: nuke .obj files, not .o.d files.

On Windows, we want to nuke .obj files when clobbering the build.
We don't generate .o.d files anymore, so don't try to delete those.

BUG=82385
NOTRY=true
TBR=thakis

Review URL: https://codereview.chromium.org/150203013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250567 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250567